New Stamps Celebrate Existence of Stamps

The Royal Mail has released some stamps to celebrate stamps themselves, putting images of stamps on stamps and possibly creating the sort of delivery paradox wormhole into which Yodel and Hermes packages routinely disappear.

The set specifically celebrates the Machin Definitive stamp, or the classic image of the Queen that's been used on our stamps since the late 1960s. Since 1967, in fact, as it's been reproduced on stamps for 50 years now. Hence a new set of six stamps that look at how the classic image was created as a bas-relief cast by sculptor Arnold Machin. [Royal Mail]